New to warrior
In pvp I enjoy running 0/0/30/10/30. With hammer/LB, Utilities: healing sig, bull charge, zerker stance, and dolyak sig, ulti: signet. This is pretty much your average hambow build. You can also switch out LB for axe/shield and switch a few traits around. Use zerker ammy and lyssa runes for the crit and condi cleanse with ulti.
As for thieves their blinds can pretty much shut you down. Pretty much kill them before zerk stance runs out, and make sure to use your full burst to cleanse 3condi with ire.
Guards are very survivable. Kinda just have to roll with the punches until their defenses wear out. Guards with a lot of stability are a good counter to any control build.